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WO2012105566A1 - Non-tissé et produit textile - Google Patents

Non-tissé et produit textile Download PDF

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Publication number
WO2012105566A1
WO2012105566A1 PCT/JP2012/052160 JP2012052160W WO2012105566A1 WO 2012105566 A1 WO2012105566 A1 WO 2012105566A1 JP 2012052160 W JP2012052160 W JP 2012052160W WO 2012105566 A1 WO2012105566 A1 WO 2012105566A1
Authority
WO
WIPO (PCT)
Prior art keywords
nonwoven fabric
mass
layers
layer
olefin polymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2012/052160
Other languages
English (en)
Japanese (ja)
Inventor
洋平 郡
智明 武部
南　裕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Idemitsu Kosan Co Ltd
Original Assignee
Idemitsu Kosan Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Idemitsu Kosan Co Ltd filed Critical Idemitsu Kosan Co Ltd
Priority to JP2012555902A priority Critical patent/JP5914367B2/ja
Priority to EP12742149.3A priority patent/EP2671993B1/fr
Priority to US13/982,640 priority patent/US20130323995A1/en
Publication of WO2012105566A1 publication Critical patent/WO2012105566A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/007—Addition polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/05—5 or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2437/00—Clothing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
    • C08F4/62—Refractory metals or compounds thereof
    • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
    • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
    • C08F4/65908—Component covered by group C08F4/64 containing a transition metal-carbon bond in combination with an ionising compound other than alumoxane, e.g. (C6F5)4B-X+
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
    • C08F4/62—Refractory metals or compounds thereof
    • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
    • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
    • C08F4/65912—Component covered by group C08F4/64 containing a transition metal-carbon bond in combination with an organoaluminium compound
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
    • C08F4/62—Refractory metals or compounds thereof
    • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
    • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
    • C08F4/6592—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
    • C08F4/65922—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring containing at least two cyclopentadienyl rings, fused or not
    • C08F4/65927—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring containing at least two cyclopentadienyl rings, fused or not two cyclopentadienyl rings being mutually bridged
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/637—Including strand or fiber material which is a monofilament composed of two or more polymeric materials in physically distinct relationship [e.g., sheath-core, side-by-side, islands-in-sea, fibrils-in-matrix, etc.] or composed of physical blend of chemically different polymeric materials or a physical blend of a polymeric material and a filler material
    • Y10T442/641—Sheath-core multicomponent strand or fiber material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/659—Including an additional nonwoven fabric
    • Y10T442/671—Multiple nonwoven fabric layers composed of the same polymeric strand or fiber material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/696—Including strand or fiber material which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous compositions, water solubility, heat shrinkability, etc.]

Definitions

  • the present invention relates to a nonwoven fabric excellent in low-temperature heat sealability and a fiber product using the nonwoven fabric.
  • Patent Document 1 discloses an elastic nonwoven fabric that has excellent elastic recoverability, has no stickiness, and has a good touch, and a fiber product using the elastic nonwoven fabric.
  • sanitary products such as disposable diapers are disposable products, so it is desirable to reduce the cost of products by simplifying the manufacturing process, especially to improve the secondary processability of nonwoven fabrics.
  • One of the indexes of the secondary processability includes heat sealability and laminate property between nonwoven fabrics or nonwoven fabric and film. Furthermore, in order to obtain necessary heat seal strength at low cost, low temperature heat sealability Is required.
  • an object of the present invention is to provide a nonwoven fabric excellent in secondary processability, particularly low temperature heat sealability, and a fiber product using the nonwoven fabric.
  • the present inventors have a certain range of melting point (Tm) and certain range of melting absorption heat ( ⁇ H), and the melting point and melting absorption heat satisfy a specific relationship. It has been found that by using a crystalline resin composition containing a certain amount of a low crystalline olefin-based polymer, a nonwoven fabric excellent in low-temperature heat sealability and a fiber product using the nonwoven fabric can be provided. It came to complete.
  • a nonwoven fabric composed of one or more layers A non-woven fabric consisting of one layer Or at least 1 layer of the nonwoven fabric which consists of two layers, Or at least one of the outermost two layers of the multilayer nonwoven fabric composed of three or more layers, A nonwoven fabric comprising a crystalline resin composition containing 1 to 99% by mass of a low crystalline olefin polymer satisfying the following property (a).
  • a nonwoven fabric composed of one or more layers The fibers constituting the nonwoven fabric consisting of one layer are Or the fiber which comprises at least 1 layer in the nonwoven fabric which consists of 2 layers, Or the fiber which comprises the outermost layer of the multilayer nonwoven fabric which consists of three or more layers, A core-sheath type composite fiber having a sheath component of a crystalline resin composition containing 1 to 99% by mass of a low crystalline olefin polymer satisfying the following property (a), and the ratio of the sheath component is the core component And a non-woven fabric which is a core-sheath type composite fiber of 1 to 99% by mass with respect to the total amount of the sheath component.
  • the ratio of the outermost layer made of the crystalline resin composition to the entire layer is 1 to 99% on a basis weight basis.
  • the nonwoven fabric in any one of.
  • the nonwoven fabric of the present invention is particularly excellent in low-temperature heat sealability (for example, heat seal strength at 160 to 180 ° C.), it is excellent in secondary processability and can stably provide various fiber products at low cost.
  • the nonwoven fabric of the present invention is produced using a crystalline resin composition containing a certain amount of a low crystalline olefin polymer.
  • the low crystalline olefin polymer is a crystalline olefin polymer having a moderate disorder in stereoregularity, and specifically, an olefin polymer that satisfies the following property (a): Refers to coalescence.
  • an olefin polymer that does not satisfy the characteristic (a) may be referred to as a highly crystalline olefin polymer (or a highly crystalline polypropylene when the olefin polymer is polypropylene).
  • the melting point (Tm) and the melting endotherm ( ⁇ H) satisfy the following relationship. ⁇ H ⁇ 6 ⁇ (Tm-140 °C)
  • the characteristic (a) indicates that the melting endotherm is high instead of the melting point, and the one obtained by the method for producing a low crystalline olefin polymer described later satisfies the characteristic (a).
  • An olefin polymer produced using a conventional Ziegler-Natta catalyst having a plurality of different active sites usually does not satisfy the characteristic (a).
  • the crystalline resin composition used in the present invention is a composition containing a low crystalline olefin polymer as described above.
  • the low crystalline olefin polymer preferably further satisfies the following characteristics (b) or (c), and more preferably satisfies the following characteristics (b) and (c).
  • fusing point (Tm) is 0 degreeC or more and less than 120 degreeC.
  • Tm melting
  • ⁇ H The melting endotherm ( ⁇ H) is 1 to 100 J / g.
  • the low crystalline olefin polymer used in the present invention is preferably an olefin polymer obtained by polymerizing one or more monomers selected from ethylene and an ⁇ -olefin having 3 to 28 carbon atoms.
  • An olefin polymer obtained by polymerizing one or more monomers selected from 28 ⁇ -olefins is particularly preferable.
  • Examples of the ⁇ -olefin having 3 to 28 carbon atoms include propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-octene, 1-decene, 1-undecene and 1-dodecene.
  • ⁇ -olefins having 3 to 16 carbon atoms are preferable, ⁇ -olefins having 3 to 10 carbon atoms are more preferable, ⁇ -olefins having 3 to 6 carbon atoms are more preferable, and propylene is particularly preferable.
  • olefin polymer obtained by polymerizing one of these alone may be used, or an olefin copolymer obtained by copolymerizing two or more of them may be used.
  • the term “olefin polymer” simply includes an olefin copolymer.
  • the low crystalline olefin polymer is particularly preferably low crystalline polypropylene.
  • the polypropylene may be a copolymer with the ⁇ -olefin other than propylene as long as the property (a) is satisfied.
  • the use ratio of the ⁇ -olefin other than propylene is preferably 2% by mass or less, more preferably 1% by mass or less, based on the total amount of propylene and the other ⁇ -olefins.
  • the low crystalline olefin polymer satisfying the above-mentioned property (a) may be used alone or in combination of two or more.
  • the low crystalline olefin polymer used in the present invention is an olefin polymer represented by the above characteristic (a) and preferably satisfies the above characteristic (b), that is, preferably has a melting point (Tm) of 0. It is an olefin polymer having a low melting point of not lower than 120 ° C and lower than 120 ° C. If the melting point is 0 ° C. or higher, it is difficult to become a sticky component or a liquid component. If it is less than 120 degreeC, the fall of the fusion
  • the low crystalline olefin polymer used in the present invention preferably satisfies the above characteristic (c), that is, preferably has a melting endotherm ( ⁇ H) of 1 to 100 J / g. If the melting endotherm is 1 J / g or more, it will not be in a completely amorphous or molten state at room temperature, and if it is 100 J / g or less, the crystallinity of the nonwoven fabric is low and the effect of improving the low-temperature heat sealability is improved. Easy to get.
  • the melting endotherm is preferably 2 to 90 J / g, more preferably 2 to 60 J / g, more preferably 5 to 50 J / g, still more preferably 10 to 50 J / g, and particularly preferably 15 to 40 J / g.
  • the low crystalline olefin polymer used in the present invention needs to satisfy the following relationship between the melting point (Tm) and the melting endotherm ( ⁇ H), as shown by the above characteristic (a).
  • Tm melting point
  • ⁇ H melting endotherm
  • ⁇ H ⁇ 6 ⁇ Tm-140 °C
  • ⁇ H ⁇ 3 ⁇ Tm ⁇ 120 ° C.
  • ⁇ H ⁇ 2 ⁇ Tm ⁇ 100 ° C.
  • the low crystalline olefin polymer used in the present invention preferably has a crystallization temperature (Tc) of 10 to 60 ° C., more preferably 20 to 50 ° C., further preferably 30 to 40 ° C. is there.
  • the melt flow rate (MFR) is preferably 20 to 400 g / 10 minutes, more preferably 20 to 200 g / 10 minutes, still more preferably 20 to 100 g / 10 minutes, and particularly preferably 40 to 80 g / 10 minutes. It is.
  • the crystallization temperature and MFR are values measured by the method described in Examples.
  • the low crystalline olefin polymer used in the present invention is particularly preferably a low crystalline olefin polymer satisfying the following characteristics (d) to (i), and the following characteristics (d) to (i It is more preferable that it is a low crystalline polypropylene satisfying the above.
  • the low crystalline polypropylene preferably used in the present invention has a [mmmm] (mesopentad fraction) of preferably 20 to 60 mol%. If [mmmm] is 20 mol% or more, solidification after melting does not slow down, and it is possible to suppress stickiness of the fibers, so that there is no difficulty in adhering to the winding roll and making continuous molding difficult. Moreover, if [mmmm] is 60 mol% or less, it will be excellent in low-temperature heat-sealing property, and crystallinity will not be too high, and elastic recoverability will become favorable. From such a viewpoint, [mmmm] is preferably 30 to 50 mol%, more preferably 40 to 50 mol%.
  • the low crystalline polypropylene preferably used in the present invention has [rrrr] / (1- [mmmm]) of preferably 0.1 or less.
  • [Rrrr] / (1- [mmmm]) is an index indicating the uniformity of the regularity distribution of the low crystalline polypropylene. When this value is increased, it becomes a mixture of highly stereoregular polypropylene and atactic polypropylene like conventional polypropylene produced using an existing catalyst system, which causes stickiness.
  • [rrrr] / (1- [mmmm]) is preferably 0.001 to 0.05, more preferably 0.001 to 0.04, and still more preferably 0.01 to 0.04. It is.
  • the low crystalline polypropylene preferably used in the present invention has [rmrm] preferably exceeding 2.5 mol%. If [rmrm] exceeds 2.5 mol%, the randomness of the low crystalline polypropylene can be maintained, so that the crystallinity increases due to crystallization by the isotactic polypropylene block chain, and the elastic recovery property decreases. There is no such thing. From such a viewpoint, [rmrm] is preferably 2.6 mol% or more, more preferably 2.7 mol% or more. The upper limit is usually preferably about 10 mol%, more preferably 7 mol%, still more preferably 5 mol%, and particularly preferably 4 mol%.
  • the low crystalline polypropylene preferably used in the present invention has [mm] ⁇ [rr] / [mr] 2 of preferably 2.0 or less.
  • [Mm] ⁇ [rr] / [mr] 2 represents an index of randomness of the polymer. If this value is 2.0 or less, sufficient elastic recovery is obtained in the fiber obtained by spinning, and stickiness is also suppressed.
  • [mm] ⁇ [rr] / [mr] 2 is preferably more than 0.25 and 1.8 or less, more preferably 0.5 to 1.8, and still more preferably 1 to 1. 8, particularly preferably 1.2 to 1.6.
  • Weight average molecular weight (Mw) 10,000 to 200,000
  • the low crystalline polypropylene preferably used in the present invention has a weight average molecular weight of preferably 10,000 to 200,000. If the weight average molecular weight is 10,000 or more, the viscosity of the low crystalline polypropylene is not too low and is moderate, and thus breakage during spinning is suppressed. If the weight average molecular weight is 200,000 or less, the viscosity of the low crystalline polypropylene is not too high, and the spinnability is improved. From such a viewpoint, the weight average molecular weight is preferably 30,000 to 200,000, more preferably 40,000 to 150,000, still more preferably 80,000 to 150,000, and particularly preferably 100,000 to 140,000.
  • the low crystalline polypropylene preferably used in the present invention has a molecular weight distribution (Mw / Mn) of preferably less than 4. If the molecular weight distribution is less than 4, the occurrence of stickiness in the fiber obtained by spinning is suppressed.
  • This molecular weight distribution is preferably 3 or less, more preferably 2.5 or less, and further preferably 1.5 to 2.5.
  • the method for producing a low crystalline olefin polymer used in the present invention is obtained by combining (A) a transition metal compound forming a crosslinked structure via two crosslinking groups and (B) a cocatalyst.
  • a method of polymerizing or copolymerizing the ⁇ -olefin such as propylene using a metallocene catalyst is preferable. According to this method, it is possible to easily produce a low crystalline olefin polymer that satisfies the above characteristic (a).
  • a transition metal compound (A) represented by the following general formula (I), and a compound that can form an ionic complex by reacting with the transition metal compound of the component (A) or a derivative thereof examples thereof include a method of polymerizing or copolymerizing the ⁇ -olefin such as propylene in the presence of a polymerization catalyst containing a promoter component (B) selected from B-1) and aluminoxane (B-2).
  • M represents a group 3-10 group element or a lanthanoid series metal element
  • E 1 and E 2 represent a substituted cyclopentadienyl group, an indenyl group, a substituted indenyl group, a heterocyclo group, respectively.
  • X represents a ⁇ -bonding ligand, and when there are a plurality of X, the plurality of X may be the same or different and may be cross-linked with other X, E 1 , E 2 or Y.
  • Y represents a Lewis base, and when there are a plurality of Y, the plurality of Y may be the same or different, may be cross-linked with other Y, E 1 , E 2 or X, and
  • a 1 and A 2 are A divalent bridging group that binds two ligands, a hydrocarbon group having 1 to 20 carbon atoms, a halogen-containing hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing group, a germanium-containing group, a tin-containing group , -O -, - CO -, - S -, - SO 2 -, - Se -, - NR 1 -, - PR 1 -, - P (O) R 1 -
  • transition metal compound represented by the general formula (I) include (1,2′-dimethylsilylene) (2,1′-dimethylsilylene) bis (3-n-butylindenyl) zirconium dichloride, ( 1,2′-dimethylsilylene) (2,1′-dimethylsilylene) bis (3-trimethylsilylmethylindenyl) zirconium dichloride, (1,2′-dimethylsilylene) (2,1′-dimethylsilylene) bis (3 -Phenylindenyl) zirconium dichloride, (1,2'-dimethylsilylene) (2,1'-dimethylsilylene) bis (4,5-benzoindenyl) zirconium dichloride, (1,2'-dimethylsilylene) (2 , 1′-dimethylsilylene) bis (4-isopropylindenyl) zirconium dichloride, (1,2′-dimethyl) Silylene) (2,1'
  • dimethylanilinium tetrakispentafluorophenyl borate triethylammonium tetraphenylborate, tri-n-butylammonium tetraphenylborate, trimethylammonium tetraphenylborate
  • examples thereof include tetraethylammonium tetraphenylborate, methyl (tri-n-butyl) ammonium tetraphenylborate, and benzyl (tri-n-butyl) ammonium tetraphenylborate.
  • the component (B-1) may be used alone or in combination of two or more.
  • examples of the aluminoxane as the component (B-2) include methylaluminoxane, ethylaluminoxane, isobutylaluminoxane, and the like. These aluminoxanes may be used individually by 1 type, and may be used in combination of 2 or more type. Further, one or more of the component (B-1) and one or more of the component (B-2) may be used in combination.
  • an organoaluminum compound can be used as the component (C) in addition to the components (A) and (B).
  • the organoaluminum compound of component (C) trimethylaluminum, triethylaluminum, triisopropylaluminum, triisobutylaluminum, dimethylaluminum chloride, diethylaluminum chloride, methylaluminum dichloride, ethylaluminum dichloride, dimethylaluminum fluoride, diisobutyl Aluminum hydride, diethylaluminum hydride, ethylaluminum sesquichloride, etc. are mentioned.
  • These organoaluminum compounds may be used individually by 1 type, and may be used in combination of 2 or more type.
  • at least one catalyst component can be supported on a suitable carrier and used.
  • the polymerization method is not particularly limited, and any method such as a slurry polymerization method, a gas phase polymerization method, a bulk polymerization method, a solution polymerization method, and a suspension polymerization method may be used, but a bulk polymerization method and a solution polymerization method are particularly preferable. preferable.
  • the polymerization temperature is usually from ⁇ 100 to 250 ° C.
  • the ratio of the catalyst to the reaction raw material is preferably “raw material monomer / component (A)” (molar ratio) of preferably 1 to 10 8 , more preferably 10 to 10 5 , Preferably, it is 10 2 to 10 5 .
  • the polymerization time is usually preferably 5 minutes to 10 hours
  • the reaction pressure is usually preferably normal pressure to 20 MPa (gauge pressure).
  • the crystalline resin composition used in the present invention contains 1 to 99% by mass of a low crystalline olefin polymer.
  • the content of the olefin polymer is less than 1% by mass, the effect of improving the low-temperature heat sealability of the nonwoven fabric is poor, and when it exceeds 99% by mass, the formability due to the stickiness of the nonwoven fabric and the feeling of touch are reduced. It also leads to a decrease in strength.
  • the content of the olefin polymer is preferably 1 to 49% by mass, more preferably 1 to 40% by mass, and more preferably 3 to 40% by mass.
  • the preferable range may be different between the case where the single fiber is used and the case where the core-sheath type composite fiber is used, and the preferable range in each case will be described later.
  • the crystalline resin composition may contain other thermoplastic resins and additives as components other than the low-crystalline olefin polymer.
  • other thermoplastic resins include the highly crystalline olefin polymer, ethylene-vinyl acetate copolymer, hydrogenated styrene elastomer, polyester resin, polyamide resin, and the like. These may be used individually by 1 type and may be used in combination of 2 or more type.
  • the above highly crystalline olefin polymer is preferable from the viewpoints of compatibility, touch feeling, flexibility, and the like.
  • the melting point (Tm) of the highly crystalline olefin polymer is preferably 120 to 200 ° C., more preferably 130 to 180 ° C., still more preferably 150 to 175 ° C.
  • the melting endotherm ( ⁇ H) is preferably Is 50 to 200 J / g, more preferably 55 to 190 J / g, more preferably 60 to 150 J / g, more preferably 70 to 130 J / g, still more preferably 70 to 110 J / g, particularly preferably 80 to 110 J / g. g.
  • the melt flow rate (MFR) of the highly crystalline olefin polymer is preferably 1 to 100 g / 10 minutes, more preferably 10 to 80 g / 10 minutes, still more preferably 15 to 80 g / 10 minutes, particularly The amount is preferably 15 to 50 g / 10 minutes.
  • MFR melt flow rate
  • the highly crystalline olefin polymer is preferably an olefin polymer obtained by polymerizing one or more monomers selected from ethylene and an ⁇ -olefin having 3 to 28 carbon atoms, and more preferably having 3 to 28 carbon atoms.
  • An olefin polymer obtained by polymerizing one or more monomers selected from ⁇ -olefins is preferred. Examples of the ⁇ -olefin are the same as those described above.
  • a propylene homopolymer, a propylene-ethylene random copolymer, a propylene-ethylene-1-butene random copolymer, and a propylene-ethylene block copolymer are particularly preferable.
  • a homopolymer (polypropylene) is more preferred.
  • additives conventionally known additives can be blended, for example, foaming agents, crystal nucleating agents, anti-glare stabilizers, ultraviolet absorbers, light stabilizers, heat stabilizers, antistatic agents, mold release agents, Flame retardant, synthetic oil, wax, electrical property improver, anti-slip agent, anti-blocking agent, viscosity modifier, anti-coloring agent, anti-fogging agent, lubricant, pigment, dye, plasticizer, softener, anti-aging agent, Examples include hydrochloric acid absorbents, chlorine scavengers, antioxidants, and anti-sticking agents.
  • the crystalline resin composition used in the present invention will melt the low crystalline polyolefin component as long as the temperature is higher than the melting point of the low crystalline polyolefin. And it becomes possible to express heat-sealing property (heat-fusion property). Based on such a principle, a composition comprising a low crystalline polyolefin rather than a single component of a high crystalline polyolefin enables heat sealing at a low temperature, and in particular, the content of the low crystalline polyolefin is large. The higher the heat seal strength is.
  • the nonwoven fabric of the present invention is (1) a crystalline resin comprising 1 to 99% by mass of a low crystalline olefin polymer satisfying the above characteristic (a), wherein the nonwoven fabric comprises one or more layers.
  • a non-woven fabric using the composition which takes any one of the following Embodiments 1 to 3.
  • (Embodiment 1) A nonwoven fabric comprising a crystalline resin composition containing 1 to 99% by mass of a low crystalline olefin polymer satisfying the above-mentioned characteristic (a).
  • Embodiment 2 A crystalline resin comprising 1 to 99% by mass of a low crystalline olefin polymer satisfying the above-mentioned characteristic (a), wherein the nonwoven fabric is composed of two layers.
  • a non-woven fabric using the composition (Embodiment 3) A multi-layered nonwoven fabric composed of three or more layers, wherein at least one of the two outermost layers of the nonwoven fabric is a low crystalline olefin polymer that satisfies the above-mentioned property (a) 1 to 99 A nonwoven fabric using a crystalline resin composition containing mass%.
  • the two layers are formed using the crystalline resin composition.
  • both of the outermost layer 2 layers use the said crystalline resin composition.
  • the outermost layer means an (AA) layer and a (CC) layer.
  • at least one of the outermost (AA) layer and (CC) layer may be a layer formed using the crystalline resin composition, and both layers are crystalline.
  • the layer using a resin composition may be sufficient.
  • the content of the low crystalline olefin polymer in the crystalline resin composition is preferably 1 to 49% by mass, more preferably 3%, from the viewpoint of low temperature heat sealability. From 49 to 99% by mass, more preferably from 3 to 30% by mass, preferably from 7 to 99% by mass, more preferably from 7 to 49% by mass from the viewpoint that the effect of improving low-temperature heat sealability is particularly remarkable.
  • the content is preferably 7 to 30% by mass.
  • the ratio of the outermost layer using the crystalline resin composition to the total layer is 1 to 99 on a basis weight basis from the viewpoint of low temperature heat sealability.
  • the basis weight refers to the weight per unit area.
  • the ratio of the outermost layer to the whole layer is large, the low-temperature heat sealability is further favorable, and when the ratio is small, the strength of the nonwoven fabric can be enhanced while showing good low-temperature heat sealability. It is effective and preferable.
  • the layer which does not use the said crystalline resin composition exists in the nonwoven fabric which consists of two layers of Embodiment 2, in the multilayer nonwoven fabric which consists of the layer and Embodiment 3 of Embodiment 3, and the said crystalline resin
  • limiting in particular as a component of the layer which does not use a composition The normal thermoplastic resin used for a nonwoven fabric can be used. Among these, the highly crystalline olefin polymer is preferable, and the highly crystalline polypropylene is more preferable.
  • the same thermoplastic resin and additive as in the case of the crystalline resin composition may be contained.
  • Nonwoven fabric using core-sheath type composite fiber Another non-woven fabric of the present invention is (2) a low-crystalline olefin polymer in which the fibers constituting the non-woven fabric consisting of at least one layer satisfy the above-mentioned characteristic (a).
  • a a core-sheath type composite fiber having a crystalline resin composition containing 1 to 99% by mass as a sheath component, and the ratio of the sheath component is 1 to 99% by mass with respect to the total amount of the core component and the sheath component.
  • a non-woven fabric which is a core-sheath type composite fiber and takes any one of the following Embodiments 4 to 6.
  • a core comprising a crystalline resin composition containing 1 to 99% by mass of a low crystalline olefin polymer satisfying the above-mentioned characteristic (a) as a fiber constituting a single layer nonwoven fabric as a sheath component
  • a non-woven fabric which is a sheath-type composite fiber and is a core-sheath type composite fiber having a sheath component ratio of 1 to 99% by mass based on the total amount of the core component and the sheath component.
  • Embodiment 5 A crystalline resin composition containing 1 to 99% by mass of a low crystalline olefin polymer satisfying the above-mentioned characteristic (a) in the fibers constituting at least one layer in a two-layer nonwoven fabric A non-woven fabric which is a core-sheath type composite fiber which is a core-sheath type composite fiber as a component, and the ratio of the sheath component is 1 to 99% by mass with respect to the total amount of the core component and the sheath component.
  • a crystalline resin composition wherein the fiber constituting the outermost layer of a multilayer nonwoven fabric composed of 3 or more layers contains 1 to 99% by mass of a low crystalline olefin polymer satisfying the above-mentioned characteristic (a) A non-woven fabric which is a core-sheath type composite fiber having a sheath component as a sheath component, and the ratio of the sheath component is 1 to 99% by mass with respect to the total amount of the core component and the sheath component.
  • the crystalline resin composition may contain other thermoplastic resins and additives as components other than the low-crystalline olefin polymer.
  • the content of the core-sheath type composite fiber in such a nonwoven fabric is preferably 1 to 100% by mass, more preferably 10 to 100% by mass, more preferably 30 to 100% by mass, and more preferably 50 to 100%. % By mass, more preferably 70 to 100% by mass, still more preferably 80 to 100% by mass, particularly preferably 90 to 100% by mass, and most preferably substantially 100% by mass.
  • the ratio of the sheath component of the core-sheath composite fiber needs to be 1 to 99% by mass with respect to the total amount of the core component and the sheath component from the viewpoint of heat seal strength and low temperature heat sealability.
  • the ratio of the sheath component is less than 1% by mass, the thickness of the sheath part becomes too thin and the effect of improving the low-temperature heat sealability of the nonwoven fabric cannot be obtained, and when it exceeds 99% by mass, the strength of the nonwoven fabric decreases.
  • the ratio of the sheath component of the core-sheath composite fiber is preferably 1 to 49% by mass, more preferably 5 to 49% by mass, and more preferably 15 to 15% by mass with respect to the total amount of the core component and the sheath component. It is 49% by mass, more preferably 25 to 49% by mass, particularly preferably 30 to 49% by mass.
  • the fibers constituting both the two layers are core-sheath type composite fibers having the crystalline resin composition as a sheath component.
  • the fibers constituting both of the outermost two layers are core-sheath type composite fibers having the crystalline resin composition as a sheath component.
  • the content of the low crystalline olefin polymer in the crystalline resin composition is preferably 1 to 49% by mass, more preferably 3%, from the viewpoint of low temperature heat sealability. It is ⁇ 49 mass%, more preferably 3 to 40 mass%, further preferably 10 to 40 mass%, particularly preferably 15 to 35 mass%.
  • the ratio of the outermost layer made of the crystalline resin composition to the total layers is 1 to 99 on a basis weight basis from the viewpoint of low-temperature heat sealability. %, More preferably 1 to 60%, more preferably 5 to 60%, more preferably 10 to 60%, still more preferably 20 to 60%, and particularly preferably 40 to 60%.
  • the sheath component is described as described above.
  • the core component is not particularly limited, and a normal thermoplastic resin used for a nonwoven fabric or a composition containing the resin can be used.
  • the thermoplastic resins the highly crystalline olefin is used. Polymers are preferred, and the highly crystalline polypropylene is more preferred.
  • the core component may also contain other thermoplastic resins and additives similar to the case of the crystalline resin composition of the sheath component.
  • the crystalline resin composition defined as the sheath component may be used as long as it is different from the sheath component to be used.
  • the layer and a multilayer nonwoven fabric composed of three or more layers are composed of other than the core-sheath conjugate fiber.
  • the layer component is not particularly limited, and ordinary thermoplastic resins used for nonwoven fabrics can be used. Among them, the highly crystalline olefin polymer is preferable, and the highly crystalline polypropylene is more preferable. preferable. Also as a component of this layer, you may contain the other thermoplastic resin and additive agent similar to the case of the said crystalline resin composition.
  • the fiber of the layer comprised other than the said core-sheath-type composite fiber may be a core-sheath-type composite fiber outside the said prescribed
  • the thermoplastic resin constituting the core component and the component constituting the sheath component that is, the low crystalline olefin polymer contained in the crystalline resin composition described above, the low crystal
  • the difference in melting point with at least one of other thermoplastic resins and additives as a component other than the functional olefin polymer is less than 20 ° C.
  • the melting point difference is more preferably 18 ° C. or less, further preferably 15 ° C. or less, and particularly preferably includes a material having the same melting point.
  • Nonwoven fabric There is no restriction
  • the nonwoven fabric produced by the spunbond method is referred to as a spunbond nonwoven fabric.
  • a melt-kneaded crystalline resin composition is spun, stretched and opened to form continuous long fibers, and the continuous long fibers are subsequently deposited on the moving collection surface in a continuous process.
  • the nonwoven fabric is manufactured by entanglement.
  • a nonwoven fabric can be produced continuously, and since the fibers constituting the nonwoven fabric are continuous long fibers drawn, the strength is high.
  • a conventionally known method can be adopted as the spunbond method.
  • fibers can be produced by extruding molten polymer from a large nozzle having several thousand holes or a small nozzle group having, for example, about 40 holes.
  • the discharge rate of the fibers per single hole is preferably 0.1 to 1 g / min, and more preferably 0.3 to 0.7 g / min.
  • the molten fiber is cooled by a cross-flow chilled air system, then pulled away from the nozzle and drawn by high velocity air.
  • the first method is a method in which a filament is stretched using a suction slot (slot stretching), and performed at the nozzle width or the machine width.
  • the filament is drawn through a nozzle or a suction gun. Filaments formed in this manner are collected on a screen (wire) or a pore-forming belt to form a web.
  • the web passes through a compression roll, and then passes between heated calender rolls, where the raised portions on one roll are joined at a portion containing 10% to 40% area of the web to form a nonwoven fabric. It is.
  • thermal bonding such as embossing, hot air, and calendar, adhesive bonding, mechanical entanglement such as needle punching, water punching, and the like can be employed.
  • a non-woven fabric is first produced using a crystalline resin composition containing the low crystalline olefin polymer, and a non-woven fabric is formed on the non-woven fabric by a spunbond method, a melt blow method, or the like. Furthermore, the method of laminating a nonwoven fabric on it and fusing it by heating and pressurization is mentioned.
  • laminating means such as thermal bonding and adhesive bonding as a laminating means for forming a multilayer nonwoven fabric
  • a simple and inexpensive thermal bonding laminating means in particular, a hot embossing roll method can also be adopted.
  • the hot embossing roll method can be laminated using a known laminating apparatus using an embossing roll and a flat roll.
  • embossing roll various shapes of embossing patterns can be adopted, and there are a lattice shape in which each welded portion is continuous, an independent lattice shape, an arbitrary distribution, and the like.
  • the flexibility of the nonwoven fabric can be controlled by adjusting the temperature during embossing or adjusting the spinning speed.
  • the temperature is preferably in the range of 90 to 130 ° C.
  • the embossing temperature is 90 ° C. or higher, the fibers are sufficiently fused to increase the strength of the nonwoven fabric.
  • the embossing temperature is 130 ° C. or lower, there is no possibility that the low crystalline olefin polymer is completely melted to form a film, and the nonwoven fabric has high flexibility.
  • Examples of textile products using the nonwoven fabric of the present invention include disposable diaper members, elastic members for diaper covers, elastic members for sanitary products, elastic members for sanitary products, elastic tapes, adhesive bandages, and elastic materials for clothing.
  • Various automotive parts such as door trims, various cleaning materials such as cleaning materials for copying machines, carpets Table material and the backing of the door, agriculture winding cloth, mention may be made of wood drain, shoes for members such as sports shoes skin, a bag member, industrial sealing material, such as wiping material and sheets.
  • the physical properties of the low crystalline polypropylene obtained in the following Production Example 1 were measured as follows.
  • [Melting point measurement] Using a differential scanning calorimeter (DSC-7, manufactured by Perkin Elmer), a melting endotherm obtained by holding 10 mg of a sample at ⁇ 10 ° C. for 5 minutes in a nitrogen atmosphere and then raising the temperature at 10 ° C./min. The melting point (Tm) was determined from the peak top of the peak observed on the highest temperature side of the curve. (Measurement of crystallization temperature) Using a differential scanning calorimeter (DSC-7, manufactured by Perkin Elmer Co., Ltd.), 10 mg of a sample was held at 220 ° C. for 5 minutes in a nitrogen atmosphere, and then lowered to ⁇ 30 ° C. at 20 ° C./min. The crystallization temperature (Tc) was determined from the peak top of the peak of the exothermic curve.
  • Zambelli et al The meso fraction, the racemic fraction, and the racemic meso-racemic meso in the pentad unit in the polypropylene molecular chain measured by the methyl group signal in the 13 C-NMR spectrum were obtained according to the proposed method. It is a fraction. As the mesopentad fraction [mmmm] increases, the stereoregularity increases. The triad fractions [mm], [rr] and [mr] were also calculated by the above method.
  • Weight average molecular weight (Mw), molecular weight distribution (Mw / Mn) measurement The weight average molecular weight (Mw) and molecular weight distribution (Mw / Mn) were determined by gel permeation chromatography (GPC). For the measurement, the following apparatus and conditions were used, and a weight average molecular weight in terms of polystyrene was obtained.
  • ⁇ GPC measurement device Column: TOSO GMHHR-H (S) HT Detector: RI detector for liquid chromatogram WATERS 150C ⁇ Measurement conditions> Solvent: 1,2,4-trichlorobenzene Measurement temperature: 145 ° C Flow rate: 1.0 ml / min Sample concentration: 2.2 mg / ml Injection volume: 160 ⁇ l Calibration curve: Universal Calibration Analysis program: HT-GPC (Ver.1.0)
  • MFR Melt flow rate
  • Production Example 1 (Production of low crystalline polypropylene) To a stainless steel reactor with an internal volume of 20 L equipped with a stirrer, n-heptane was 20 L / h, triisobutylaluminum was 15 mmol / h, dimethylanilinium tetrakispentafluorophenylborate and (1,2'-dimethylsilylene) (2 , 1′-Dimethylsilylene) -bis (3-trimethylsilylmethylindenyl) zirconium dichloride, triisobutylaluminum and propylene in a mass ratio of 1: 2: 20 in advance were converted into zirconium. Continuous supply at 6 ⁇ mol / h.
  • the polymerization temperature was set to 67 ° C., and propylene and hydrogen were added so that the hydrogen concentration in the gas phase part of the reactor was maintained at 0.8 mol% and the total pressure in the reactor was maintained at 0.7 MPa (gauge pressure).
  • the polymerization reaction was carried out continuously.
  • “Irganox 1010” manufactured by Ciba Specialty Chemicals) as a stabilizer is added to the resulting polymerization solution so that the content is 500 mass ppm, and then n-heptane as a solvent is removed.
  • a low crystalline polypropylene having the physical properties shown in Table 1 was obtained.
  • the heat seal strength at each temperature was measured as follows. [Measurement of heat seal strength] From the obtained nonwoven fabric, a test piece having a length of 200 mm and a width of 40 mm was sampled with respect to the machine direction (MD). Using a heat seal tester (manufactured by Toyo Seiki Kogyo Co., Ltd., thermal gradient tester), the two nonwoven fabrics were heat sealed at 165 ° C., 170 ° C. or 175 ° C. for 2 seconds at a pressure of 0.2 MPa. There are five heat blocks, and the heat bonding area of one block is 250 mm 2 (25 mm ⁇ 10 mm).
  • the unbonded portions of the two nonwoven fabrics are each gripped with a chuck and stretched at a tensile speed of 200 mm / min. And the load when nonwoven fabrics peeled was measured, and the heat seal strength was determined. In addition, when the nonwoven fabric broke before the nonwoven fabrics peeled off, it was described as “material breakage”.
  • PP manufactured by Nippon Polypro Co., Ltd.
  • melting point about 164 ° C.
  • melting endotherm 94 J / g
  • the raw material is melt-extruded at a resin temperature of 230 ° C using a single screw extruder, and the molten resin is discharged at a rate of 0.5 g / min per single hole from a core-sheath composite nozzle (number of holes: 841 holes) with a nozzle diameter of 0.3 mm. And spun. While cooling the fibers obtained by spinning with air, the fibers are sucked at an ejector pressure of 2.0 kg / cm 2 and laminated on the net surface moving at a line speed of 49 m / min. First layer] was obtained.
  • the above-mentioned spunbond method is used to directly deposit high crystalline polypropylene fibers to form the spunbond nonwoven fabric (C) [second layer].
  • the non-woven fabric (S) [third layer] produced in the same manner as described above was superposed and fused by heating and pressing with a 135 ° C. heat roll to obtain a spunbond non-woven fabric (S) / spunbond non-woven fabric (C) / A multilayer nonwoven fabric having the structure of the spunbond nonwoven fabric (S) was obtained.
  • Table 2 shows the basis weight (gsm: g / m 2 ) of each layer and the heat seal strength of the obtained nonwoven fabric at a predetermined temperature.
  • Example 2 (Production of multilayer spunbond nonwoven fabric)
  • S spunbonded nonwoven fabric
  • PP low crystalline polypropylene and high crystalline polypropylene
  • Table 2 shows the basis weight (gsm: g / m 2 ) of each layer and the heat seal strength of the obtained nonwoven fabric at a predetermined temperature.
  • Example 1 Production of multilayer spunbond nonwoven fabric
  • S spunbonded nonwoven fabric
  • a crystalline resin composition consisting only of highly crystalline polypropylene (PP, manufactured by Nippon Polypro Co., Ltd., NOVATEC SA03) was used in the production of the spunbonded nonwoven fabric (S).
  • PP highly crystalline polypropylene
  • Table 2 shows the basis weight (gsm: g / m 2 ) of each layer and the heat seal strength of the obtained nonwoven fabric at a predetermined temperature.
  • the multilayer nonwoven fabric produced in Example 1 has a markedly higher heat seal strength at 170 to 175 ° C. than the multilayer nonwoven fabric produced in Comparative Example 1, and 30 gf at 170 ° C. As described above (higher than 70 gf or higher), a heat seal strength of 270 gf or higher is obtained at 175 ° C., and it is understood that the low temperature heat sealability is excellent.
  • the multilayer nonwoven fabric produced in Example 2 is also superior in low temperature heat sealability as compared with the multilayer nonwoven fabric produced in Comparative Example 1. In Example 1 where the content of low crystalline polypropylene in the first layer and the third layer was 10% by mass, the low-temperature heat sealability was significantly improved compared to Example 2 in which the content was 5% by mass. I understand.
  • Example 3 Manufacture of a spunbond nonwoven fabric using a core-sheath type composite fiber
  • a crystalline resin composition mixed in a blending ratio of 25% by mass of the low crystalline polypropylene obtained in Production Example 1 and 75% by mass of highly crystalline polypropylene (PP, manufactured by Nippon Polypro Co., Ltd., NOVATEC SA03).
  • PP manufactured by Nippon Polypro Co., Ltd., NOVATEC SA03
  • a non-woven fabric was manufactured as follows using a spunbond apparatus using only a highly crystalline polypropylene (PP, manufactured by Nippon Polypro Co., Ltd., NOVATEC SA03) as a core component. The raw material is melt-extruded from the sheath component resin and the core component resin at a resin temperature of 230 ° C.
  • Example 4 (Production of a spunbonded nonwoven fabric using a core-sheath type composite fiber) A nonwoven fabric was produced in the same manner as in Example 3, except that spinning was performed such that the ratio of the sheath component [sheath component / (sheath component + core component)] was 20% by mass. Table 3 shows the heat seal strength of the obtained nonwoven fabric at a predetermined temperature.
  • Example 5 Manufacture of spunbonded nonwoven fabric using core-sheath type composite fiber
  • a nonwoven fabric was produced in the same manner as in Example 3 except that spinning was performed so that the ratio of the sheath component [sheath component / (sheath component + core component)] was 10% by mass.
  • Table 3 shows the heat seal strength of the obtained nonwoven fabric at a predetermined temperature.
  • a nonwoven fabric was produced in the same manner except that. Table 3 shows the heat seal strength of the obtained nonwoven fabric at a predetermined temperature.
  • the nonwoven fabrics produced in Examples 3 to 5 have significantly higher heat seal strength at 165 to 175 ° C. than the nonwoven fabric produced in Comparative Example 2, and 40 gf or more at 165 ° C.
  • the heat seal strength is 200 gf or higher at 170 ° C. (400 gf or higher at higher temperatures). At 175 ° C., the heat seal strength is high enough to break the material, and it can be seen that the heat seal strength is excellent.
  • Non-woven fabrics of the present invention are various fiber products, such as disposable diaper members, elastic members for diaper covers, elastic members for sanitary products, elastic members for hygiene products, elastic tapes, adhesive bandages, elastic members for clothing, Insulation materials for clothing, heat insulation materials for clothing, protective clothing, hats, masks, gloves, supporters, elastic bandages, bases for poultices, non-slip base fabrics, vibration absorbers, finger sack, air filters for clean rooms, electret processing Electret filters, separators, insulation materials, coffee bags, food packaging materials, automotive ceiling skin materials, soundproof materials, cushion materials, speaker dustproof materials, air cleaner materials, insulator skins, backing materials, adhesive nonwoven fabric sheets, door trims, etc.
  • fiber products such as disposable diaper members, elastic members for diaper covers, elastic members for sanitary products, elastic members for hygiene products, elastic tapes, adhesive bandages, elastic members for clothing, Insulation materials for clothing, heat insulation materials for clothing, protective clothing, hats, masks, gloves, supporters, elastic bandages, bases for poultice
  • the nonwoven fabric of the present invention is preferably used for sanitary products such as disposable diapers.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Laminated Bodies (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Multicomponent Fibers (AREA)

Abstract

L'invention concerne un non-tissé possédant des caractéristiques de fabrication secondaire, notamment des caractéristiques de thermoscellage à basse température, supérieures et un produit textile réalisé au moyen du non-tissé. L'invention concerne, de manière plus spécifique, un non-tissé comprenant au moins une couche. Selon l'invention, le non-tissé comprenant une couche, au moins une couche du non-tissé comprenant deux couches ou au moins une des deux couches les plus à l'extérieur du non-tissé multicouche comprenant au moins trois couches est formé(e) au moyen d'une composition de résine cristalline contenant de 1 à 99 % en masse d'un polymère oléfinique faiblement cristallin satisfaisant la caractéristique suivante (a): (a) le point de fusion (Tm) et l'endotherme de fusion (ΔH) satisfont la relation ΔH ≥ 6×(Tm-140°C).
PCT/JP2012/052160 2011-02-01 2012-01-31 Non-tissé et produit textile Ceased WO2012105566A1 (fr)

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US13/982,640 US20130323995A1 (en) 2011-02-01 2012-01-31 Nonwoven fabric and textile product

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WO2015178423A1 (fr) * 2014-05-20 2015-11-26 三井化学株式会社 Non-tissé stratifié, et articles hygiéniques
JP2016040428A (ja) * 2014-03-20 2016-03-24 出光興産株式会社 捲縮繊維及び不織布
JPWO2014042253A1 (ja) * 2012-09-14 2016-08-18 出光興産株式会社 多層不織布及びその製造方法
JP2016159430A (ja) * 2015-02-26 2016-09-05 出光興産株式会社 不織布積層体及び不織布積層体の製造方法

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